Combined clutch and stop motion.



A. s MELLO. COMBINED CLUTCH AND STOP-MOTION.

APPLICATION FILED FEB. I, 19!]- Patented m 29, 191?.

3 SHEETS-SHEET I Amy 8.

A. S. MELLO. COMBINED CLUTCH AND STOP MOTION. APPLICATION FILED FEB. 1.19:7.

3 SHEETSSHEET 2.

' Patented May 29,1917.

A. S. MELLO. COMBINED CLUTCH AND STOP MOTION. APPLICATION HLED FEB. l. 191i 3 SHEETS-SHEET 3- lnvenior.

Patented May 29, 1917.

IHQLE IL'itUF ii nlication filed 'E'ehruar'" 1 291?. Eerie-1 No. J i

To all whom it may concern: (action on the line 6- 6, Fig. 5'; 5% Be it known that I, Ammo l visuio, a unilzir View showing the t e citizen of the Unitedv Eitatos residing 'z'i) the driven ohii'oh member Caxnhrige, county of Middleser, State 5 Massachusetts, have invented an liiiiprorement in Combined Clutch and Stop Motions, 5:3 is ii section on the line 8-S fill of which. the following description, in 04311. i 9 is a section similar to Fig, 8, but neotion with the acci'nnpunying \"lrzzfwiiigg is the clutch members disengaged; a specification, like characters on the draw 10 is a portion of the driven clutch in ing representing like parts. r imving it tli'flerent form of broke This invention relat s to 21v combined M38 from that shown in '1'; clutch and stop motion and particularly to it 1 is it plain view of l0; clutch and. motion in "which the two ele- '5.

is .21 section on the line 1Q 12, ments oi the clutch have positive driving 10. 1' connection as distinguished from it frictional hiie my invention may be appiiei'l to 'd -i i tion. positive ohlteiies of diiiferent types, have to The object of the invention is to provide a chosen herein to iliustrste it as it might lie novel clutch and stop motion of thi ty e in applied to a clutch shown in United iftu which when the clutch is throw into so 1. :ers Patent No 3610613, dated July s 1 2o gagement, the clriven element will be started l oi'. the clutch illustrated in said potent in. rotation before the two olutol elem nts comprises 2'. driving r-iutch member having I become positively engaged, thus or a ohztclreiigngiii shoulder and dri iii an em; 5 member carrying 11 pi uoted clutch dog which is one position is adapted to engage soirl shoulder and thus provide the clutching on for starting the driven element i 1th or cushioning movement.

25 iii-mother o b iect of firednvention to l -vicle am improved clutch and stop motion of gngement betw-rn the clutch member this type having novel means for briii. .o' in the illustrated 'mhodiment of my in the driven. member to rest with a greener ientiou 1 indicate-stile shaft which is he movement and in a predetermined position driven, 2 the driven clutch member thereon,

when the clutch is disengaged. hilo my and S the A'lliiillg clutch member. The

improved olutoh has a positive driving eonslmit 1 may he the driving or operating; neotion yet nevertheless, it can be opera-tool shaft of any suitable machine. :1 portion of at h 1 speed Without subjecting the (hi which is indicated at 53. The driving; clutch element to ruitlue jar or member 3 is in the form 01: a. Carl 3, pullo In order to give an rmderstaii ing of my and is W'o ed with n belt-receiving A invention. It have illustrates in the drawings 8 to re the driving" helix. This rlriviri a. selected embodiment thereof whieliz. wiii Cll'ilfil) member is loosely mounted err the now be described, after which the novel few shaft l, and it formed with the hub i on tures will be pointed out in the appended which is loosely mmmteml a euro member 8 40 claims. thzit is provided with the olutohing shoulder Figure 1 is an end View of device mm 9. This cam. member 8 is mounted on the hoclying my inventlon; huh so as to here a slight yielding move- Fig. 2 is a View or the clevioe of Fig. 1 ment, :mci for. this purpose, it is moviileci looking from the right, and showing the with a shut 10 which extends through a slot two clutch members disengaged; 1.1 formed 1n the driving rliitoh member 3 Fig. 3 is a plan View showing the two and which is acteri upon bya spring 12 re ion.

clutch niemberslin section on the line 3-?5, ceivetl in a. chamber 13 formed in the mem- Flg. 1, said View also showing the clutch her 3. The function of tins spring Wlll he I members in engagement; I -preseiitly (lesoribecl. Fig. 4 is a View on the line i -4;. 3, The CliflR'QTl clutch member is shown in looking toward the top of the sheet;

7 end View in Fig. 4&- zinri it has a clutch dog 15 :lflii Fig. 5 1s a sectional View on the some liri Aw} thereto at 14-, said clutch (log being i-& Fi 3 lookili toward the lPGti-Ulll J'i'f l with a iuterallvextendin nose or 7 b 7 D A CD the sheet; 1011 16 that is adapted to have clutoh 7 ing engagement with the shoulder 9; all as illustrated in the abovomentioned patent. Tl clutch dog is acted upon by a pulling spring 17. one end of which. is connected to the clutch dog and the other end of which is secured to a post 18 carried by the clutch member The driven clutch member 2 is fast on the shaft 1. When the two clutch members are in ogerative engagement, the nose 16 of the clutch dog ism engagement with the shoulder 9 of the driving clutch member 3, as shown in dotted lines, Fig. 1, and'in Fig. 8, so that the rotation of the driving clutch member in the direction of the arrow Fig.1, will give rotation to the driven clinch. member the two clutch members being thus positively locked together.

in my improved clutch device the clutch members are thrown into and out of engagement by moving the clutch memberfi longitudinally of the shaft. The movement of the clutch member 3 away from the clutch member will. Withdraw the shoulder 9 laterally from the nose 16 of the clutch dog 15, thus disengaging the clutch. T he m0veuncut oi the clutch members toward each other will brin the nose 16 into engagement with the clutci shoulder 9, thus rendering the clutch operative. This clutching and unclutching movement oi the clutch member 3 may be secured in various Ways. I have herein shown for this purpose a clutch actuator in the form of a rod 19 slidably I in beari. gs 20 carried by the ma- ..d having fast thereonv a block Ides in ways 91 formed in the porso of the machine 5. The actuator 19 extends loosely through another block 21 which is also slidably carried in the ways 91 and provided with a laterally-extending arm 22 carrying a roll 23 that is received in groove formed in the driving clutch member 3. The block 21 is yieldingly held: against the block by a. spring 26 which surrounds theactuator and one end of which engages ahead 2*! on the actuator and the other end which is received in a recuss formed in the block. 21. l'rlovcmcnt of the actuator 19 toward the bottom of Fig. 3 will. posi v move the block 21 and thereby disengage the clutch. lllovement of the clutch actuator in the opposite direction Will cause the clutch meinbers to be brought into jllltlllb. The function of the spring 26 cutly described.

ii-d uborc, one o the objects of the it invention to provide :1. positive clutch oi" the tips illustrated which is so construeti-vd that when the two clutch members are thrown into clutching engagement there will be a gradual picking up of the (hives clutch member before the two clutch members come into positive driving connection. thus providing for a gradual starting of the driven element 1. The construction is also suc 1 that the driving clutch member 3 can be mover'l toward the driven clutch member 2 only when the two clutch members are in such a predetermined angular position relative to each other that the driven clutch men'lber can make nearly one revolution before the clutch shoulder i) comes into positive engagement with the nose 16 of the clutch dog 15.

This allows a time interval equal to that consumed by substantially one rotation of the driving clutch member in which the driven clutch member can receive its initial movement, so that when the clutch shoulder 9 comes into engagement with the nose 16 of the clutch dog 15, the driven clutch member will be under Way With the result that there Will be no jar or shock such as would be cccasioned by the rapidly-rotating clutch shoulder 9 coming into engagement with the stationary clutch dog 15.

When the clutch is disengaged the spring 17 tends to turn the clutch dog 15 thereby to swing the nose 16 thereoftoward the shaft 1 and the movement of the clutch dog due to the action of the spring 17 is limited by a stop 28 on which the nose 16 rests. The cam member 8 on which the clutch shoulder 9 is formed is provided With an eccentric pcriphcral surface, said surface presenting the low portion 29 just beyond the shoulder 9. and the eccentric portion 50 extending from the low portion 29 to the clutch shoulder 9. When the clutch is disengaged and the nose 16 of the clutch dog 15 is in engagement with the rest 28, said nose is so positioned relative to the periphery oil the cam 8 that the driving clutch member 3 can be moved into clutching position only when the loW portion 559 is opposite the nose 16. If the driving" clutch member 3 is in any other angular position, the nose 16 will engage the side of the cam member 8 and thus prevent the driving clutch member from being moved into its clutching position.

When the clutch is to be engaged the clutch actuator 19 is moved toward the right, Fig". 2, and this Will bring the nose 16 against the side face of the cam member 8, and said nose will bear against the side face of said cam member 8 until during the rotation of the driving clutch member 3, the low portion 29 of said cam member 8 comcsoppositc the nose 16 When this position is reached;

the c hiiching mo oes ing clutch member has roizoted sufiieiently to bring the shoulder 9 against the nose 16, then the clutch elements one in positive engagement, but by this time the iiz'ivou. clutch element been "twice. in motion. so than? the cngiigcmeui; of she shoulder 9 with the nose 16 wiil noicouse any detrimenioi jar or shock. The spring 1:? acts as a further means to assist the cushioning movement of the clutch when it is chrown into engage inent for when the shoulder 9 comes into on gagen'ien'i with the nose 1.6, the spring 12 can yield slightly.

The spring is for lzhe -nirpose of per-- miiing the fuli movement of the cluizcii actuator 19 when the clutch to be engaged, for if at tie tii'aiie of the )'lii0l'1 of the ciutch mini-Eton 19, ike driving clutch cicmcnt, is in such position the side of tho com 8 will be brought o aiust the nose 16, the spring 26 will. yield to permit the full moven'iena of the chi-och actuator, sud. soon as the driving clutch member has lfiikal i into a position to bring the low portion 29 .f the com opposite the nose 6, than the expansive action of the sprin "i. ill complete movement of ihe driving clutch member. The clutch actuator 19 may he operated by any suitable moons which it is not necessary to show. Pieiorzibly, however some usnoi means such, for inst-once, as u latch (not shown} will be provideci for lock ing the clutch member 19 in its position shown in Fig. 3. *When the clutch is to be disengaged, il'iis lkL' LCil may be misused. a the clutch actuator will. then he mew l to the left, 2, through the action of ii oning 31 usual in many clutch (iBViCQS.

My improved clutch is so constructed that when the clutch is disengsgech the driven member will be brought to rest with a gruci ual movement and inevitably in a pi-eds termiued angular position. I provide foir this by a novei broke mechanism which 0; ci'efies to :ipplg/ a broking sci-ion io the driven member when the clutch is disc gagged and a stop device to the clinch dog when the driven member reaches its pre determined position. The braking inei'ii oer is shown at 32 and is in the 01111 of a bar sliclobly mounted transversely in the block 25 carried by the ciutch actuator 19. This braking member 32 is acted upon by springs 3% which urge it toward the loft in Figs. 1' and These springs are received in re cesses ioi'meiiin the braking memoe' and are backed by u yoke which is adjustably z)\) secured on studs curried by the block 25. This yoke has guidc pins '38 extending iheiei'i'oi'o which enter the recesses and assis in guiding the iiimliii'ig; member The foi'ivai'd spriug pi'esseii movement of the braking member 32 isliinitcd by a stop lug on the block which. is odapieci to engage a shoulder 38 on 7 against the she braking mom the clutch zictuuior to the icfi; in 2, and 6 this will bring the b along member 32 against the side face of the stepped porilon 4:0, il hcn (luring she rotation of the driven clutch member, the low PUl'i'JlOll l2 oi? the stepped portion 40 comes opposite the ln-uio in member: 3:2, then the spring 31 can ucz to move the ciuich aic'zuniol' no the left, l ig.

ilms carrying the braking member 32 in po- 51.031 'lc the ecceniric b shing surface ilho contnmcd. roiutioi'i oi the d 'iven Cili'ijlfil member :uuses the eccentric lmikf surface 4:1 to not on 'lihe end. of the 3:, Mills i'oi'ciug the brake bil(,l\\'{l l(ll ";f :iciion oi? the springs 94:, The springs are of sui'licienfc stiffness.

so that She braking; pressure which is thus applied will very n'nitei'iiiliy reduce the speed of the driven clutch mcmbci'. For bringing Szhe driven clutch nieniliiei" positively to issi iii] a prcdetermincd. point, I have pi-oviilcd :1 stop dog l3 which is pivotal at to the block that is (Jilllltfi by the clutch uctuuior. ii hen the clutch in operation, th stop clog is outed at one side of the clutch dog. l flicn,

hoWevethe clutch actuator 19 moved to the left, 2, to disengage the clutcln the st" f curried into the 0421110 of coci'uich (log 15. The clutch dog 15 is provided with a tail oi such u length that it will be brought into engagement with the stop (log when said stop (log has been moved into the plane of rotation, of the clutch dog. he low psi-$122 of the stepped portion it) is so situated relative to the clutch log that the l a iug action, begins just iiiiiloi the clutch log dos jMES'El'l {the p i3, so that. the brake will be acting throu 'li nearly one complete revolution of the driven member before the fail i5 of the clutch do engages tho stop (log -13. The spring 1'? 1csisis the turning action of the ciutch (log 15 when it engages the stop dog and thus cushions the stoppii'ig InOWjlnQH l. The clutch member is provided with the rest 46 with which the clutch dog; ei'iguges when the tail of the latter strikes the S (lo and Lilla? to move the driving clutch member into and out of clutel'iing engagement with the driven. clutch member, a clutch dog movable with the elntch actuator and adapted 'to be brought into the path ol? movement of the tail of the clutch dog by the lam-latching movement of said actuator wherelrv the driven clutch member will be brought to rest, and means controlling the unclutrhing movement of said clutch actuator which permits Said actuator to have its nm-lutching; movement only when the driven clutch member in a predetermined angular position.

14. In a device of the class described, the combination with a driving and a driven clutch member, the driving clutch member having a clutch shoulder. of a clutch dog pivoted to the driven clutch member and provided with a nose to engage said shoul der and also provided with a tail, a clutch actuator movable in a direction parallel to the axis of rotation ot said clutch members to move the driving clutch member into and out of clutching engagement with the driven clutch member a clutch dog); nn: able with the clutch actuator and adapted to be brought into the path of movement of the tail of the clutch dog by the unelutching movement of said actuator wherel'iy the driven clutch member will be. brought to rest, and means controlling the imolutching; movementof said clutch actuator which permits said actuator to have its uuclutehing movement only when the driven clutch member is in a predetermined angular position which is different from that in 'whieh the tail o l' the clutch dog engage: the stop dog,

15. In a device of the class tlQSCi'll) the combination with a driving and a driven clutch member the driving clutch me having; a clutch shoulder of a eh'itch 1 pivoted to the driven clutch member and provided with a nose to engage said shoulder and also provided with a tail, a chart actuator movable in a direction parallel to the axis o'l rotation. of said elutcl'i met :rs to move the driving cluteh member into and out o'l' clutchingengagement with the driven clutch member, a elutch dog movable with the clutch actuator and adapted to be brought into the path of movement of the tail ot the clutch dog): by the unelutching movement. of said actuator whereh the driven clutch member will be. brought to rest means controlling the unelutcl'iing movement of said clutch actuator which permits said actuator to have its nnclntehing move ment only when the driven clutch member in a predetermined angular position which is different from that in which the tail of the elutch dog engages the stop dog, and means to a mlv a friction brake to the driven.

clutch member after the clutch member has ALFRE E55. l /[ELLCR 

